Market Share Calculator
Calculate your market share from company sales and total market size, in revenue or units, to benchmark competitive position.
Last reviewed by the Radiatus Cloud team
Calculate your market share as a percentage of the total market.
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Calculate market share
Market share is the percentage of a total market that a company captures, a key measure of competitive strength. It is calculated by dividing your sales by the total sales of the entire market over the same period and multiplying by one hundred. A company with two and a half million in sales in a forty-million market holds a six and a quarter percent share. Market share can be measured in revenue or in units sold, depending on what you want to compare.
Both figures must cover the same market definition, geography and time period for the result to be meaningful.
Why market share matters
Market share indicates how a company is performing relative to its competitors, not just against its own past. Gaining share means growing faster than the market, which signals a competitive advantage, while losing share can be a warning even when revenue is rising, because it means rivals are growing faster. Share also influences economies of scale, bargaining power and brand visibility.
Measuring market share requires a reliable estimate of the total market size, which can be the hardest part. Define the market carefully, since a narrow definition yields a higher share than a broad one. All calculation happens locally in your browser.
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Frequently Asked Questions
What is the market share formula?
Market share equals your sales divided by the total market sales over the same period, expressed as a percentage.
Should I measure in revenue or units?
Either works, but keep it consistent. Revenue share reflects value captured, while unit share reflects volume and reach.
Why can share fall while revenue rises?
If the overall market grows faster than your sales, your share shrinks even though your revenue increases, meaning competitors are gaining.
Where do I get the total market size?
From industry reports, trade associations or market research. Defining the market carefully is essential, as a narrower market gives a higher share.
Why does market share matter?
It shows competitive position, drives economies of scale and bargaining power, and reveals whether you are outpacing or trailing the market.
Privacy & Security
Everything runs in your browser; nothing is uploaded.
How to Use
Enter your sales and the total market size.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
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